A right circular cone with diameter as 14 m and slant height as
12 m. Determine the cost of colouring its total surface at the
rate of 14 Rs per sq. m.
A: 144
B: 213
C: 325
D: 418
Answers
Answered by
0
Answer:
Answer
Let radius=5x and height=12x
Volume of cone=
3
1
πr
2
h
2512=
3
1
∗3.14∗5x∗5x∗12x
3.14
2512∗3
=300x
3
300x
3
=2400
x
3
=
300
2400
=8
x=2
Radius=5∗2=10cm
Height=12∗2=24cm
l=
r
2
+h
2
=
10
2
+24
2
=
100+576
=
676
=26 cm
Answered by
1
Answer:
cost is 5852 rupees and area is 418m²
total area=πrl+πr²
option d is right
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